Respuesta :
At the end of The Autobiography, Benjamin Franklin realized that he will never be perfect. He wrote that a benevolent man should allow a few faults in himself, to keep his friends in countenance. He also realized that though he will never be perfect, he became happier as he lived his live according to his virtues and that is what he wanted for his descendants to have -- to live a virtuous and happy life.
He realizes the effort made him a better and happier man.
That is the answer.